T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
L
L
L
S
S
S
6
6
6
4
4
4
V
V
V
6
6
6
D
D
D
168PIN PC133 Unbuffered DIMM
256MB With 16Mx8 CL3
Transcend Information Inc.
10
Serial Presence Detect Specification
Serial Presence Detect
Byte No. Function Described Standard Specification Vendor Part
0 # of Bytes Written into Serial Memory 128bytes 80
1 Total # of Bytes of S.P.D Memory 256bytes 08
2 Fundamental Memory Type SDRAM 04
3 # of Row Addresses on this Assembly 12 0C
4 # of Column Addresses on this Assembly 10 0A
5 # of Module Rows on this Assembly 2 rows 02
6 Data Width of this Assembly 64bits 40
7 Data Width of this Assembly - 00
8 Voltage Interface Standard of this Assembly LVTTL3.3V 01
9 SDRAM Cycle Time @CAS latency of 3 7.5ns 75
10 SDRAM Access Time from Clock @CAS latency of 3 5.4ns 54
11 DIMM configuration type (non-parity, ECC) None 00
12 Refresh Rate Type 15.625us/Self Refresh 80
13 Primary SDRAM Width X8 08
14 Error Checking SDRAM Width None 00
15 Min Clock Delay for Back to Back Random Address tCCD=1CLK 01
16 SDRAM Device Attributes: Burst Lengths Supported 1,2,4,8 & Full page 8F
17 SDRAM Device Attributes: # of banks on SDRAM device 4 bank 04
18 SDRAM Device Attributes: CAS Latency 2,3 06
19 SDRAM Device Attributes: CS Latency 0 clock 01
20 SDRAM Device Attributes: Write Latency 0 clock 01
21 SDRAM Module Attributes
Non-buffered, non-registered
& redundant addressing
00
22 SDRAM Device Attributes: General
+/- 10% voltage tolerance,
Burst Read Signal bit Write
precharge all, auto
precharge
0E
23 SDRAM Cycle Time @CAS Latency of 2 10ns A0
24 SDRAM Access Time from Clock @CAS Latency of 2 6ns 60
25 SDRAM Cycle Time @CAS Latency of 1 - 00
26 SDRAM Access Time from Clock @CAS Latency of 1 - 00
27 Minimum Row Precharge Time (=t RP) 20ns 14
28 Minimum Row Active to Row Activate (=t RRD) 15ns 0F
29 Minimum RAS to CAS Delay (=t RCD) 20ns 14
30 Minimum Activate Precharge Time (=t RAS) 45ns 2D
31 Module Row Density 2 rows of 128MB 20
32 Command and Address Signal input Setup Time 1.5ns 15
33 Command and Address Signal input Hold Time 0.8ns 08
34 Data Signal Setup Time 1.5ns 15
35 Data Signal Hold Time 0.8ns 08
36-61 Superset Information - 00
62 SPD Data Revision Code JEDEC2 02
63 Checksum for Bytes 0-62 - A0
64-71 Manufacturers JEDEC ID Code per JEP-108E Transcend 7F, 4F
72 Manufacturing Location T 54
54 53 33 32 4D 4C
73-90 Manufacturers Part Number TS32MLS64V6D
53 36 34 56 36 44